CHEVROLET CAMARO CATALYTIC CONVERTER PROBLEM

2001 Chevrolet Camaro

A 2001 Camaro with 3.8v6, at speed, cuts out and/or hesitates when accellerator is applied, i.E: needing power to merge on ramp, and also any kind of rapid acceleration from idle. Any idea exactly what it might be? Have done many tests and troubleshooting already. Please help!